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. 2020 Jan 27;21(3):1537–1551. doi: 10.3892/mmr.2020.10963

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Copyright: © Brązert et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited, the use is non-commercial and no modifications or adaptations are made.

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Figure 8. — Photomicrograph representing the sections of ovaries stained with hemotoxylin and eoesin. All images present follicles in various stages of development. The description of each arrow and number is represented in brackets. (A) Primordial and primary follicles. Tissue sections exhibiting: (B) Primordial follicles and primary follicles, and (C) primary oocytes, zona pellucida, granulosa cells, theca cells, follicular cells, cortical stroma and tunica albuginea. (D) Secondary follicle. Tissue sections exhibiting: (E) secondary follicles, and (F) primary oocytes, zona pellucida, antrum, granulosa cells, theca cells and theca externa. (G) Graafian follicle. Tissue sections exhibiting: (H) Graafian follicles, and (I) secondary oocytes, zona pellucida, corona radiata, cumulus oophorus, antrum, granulosa cells and theca externa. 1, primordial follicle; 2, primary follicle; 3, 7 and 12, primary oocyte; 4, 13 and 20, zona pellucida; 5, 15 and 24, granulosa cells; 6 and 16, theca cells; 8, follicular cells; 9, corticol stroma; 10, tunica albuginea; 11, secondary follicle; 14 and 23, antrum; 17 and 25, theca externa; 18, Graafian follicle; 19, secondary oocyte; 21, corona radiata; 22, cumulus oophorus.